1222020220021 has 8 divisors (see below), whose sum is σ = 1263105093600. Its totient is φ = 1181614435440.

The previous prime is 1222020220009. The next prime is 1222020220067. The reversal of 1222020220021 is 1200220202221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1222020220021 - 2¹⁵ = 1222020187253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222020219977 and 1222020220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222020220621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169768591 + ... + 169775788.

It is an arithmetic number, because the mean of its divisors is an integer number (157888136700).

Almost surely, 2^{1222020220021} is an apocalyptic number.

It is an amenable number.

1222020220021 is a deficient number, since it is larger than the sum of its proper divisors (41084873579).

1222020220021 is an equidigital number, since it uses as much as digits as its factorization.

1222020220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339544499.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1222020220021 its reverse (1200220202221), we get a palindrome (2422240422242).

It can be divided in two parts, 12220202200 and 21, that added together give a palindrome (12220202221).

The spelling of 1222020220021 in words is "one trillion, two hundred twenty-two billion, twenty million, two hundred twenty thousand, twenty-one".